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cc4723ca PM |
1 | /* |
2 | * Copyright (c) 2008-2009 Patrick McHardy <kaber@trash.net> | |
3 | * Copyright (c) 2013 Eric Leblond <eric@regit.org> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * Development of this code funded by Astaro AG (http://www.astaro.com/) | |
10 | */ | |
11 | ||
12 | #include <linux/kernel.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/netlink.h> | |
16 | #include <linux/netfilter.h> | |
17 | #include <linux/netfilter/nf_tables.h> | |
18 | #include <net/netfilter/nf_tables.h> | |
19 | #include <net/netfilter/nft_reject.h> | |
20 | #include <net/netfilter/ipv6/nf_reject.h> | |
21 | ||
56768644 | 22 | static void nft_reject_ipv6_eval(const struct nft_expr *expr, |
a55e22e9 | 23 | struct nft_regs *regs, |
56768644 | 24 | const struct nft_pktinfo *pkt) |
cc4723ca PM |
25 | { |
26 | struct nft_reject *priv = nft_expr_priv(expr); | |
27 | struct net *net = dev_net((pkt->in != NULL) ? pkt->in : pkt->out); | |
28 | ||
29 | switch (priv->type) { | |
30 | case NFT_REJECT_ICMP_UNREACH: | |
31 | nf_send_unreach6(net, pkt->skb, priv->icmp_code, | |
32 | pkt->ops->hooknum); | |
33 | break; | |
34 | case NFT_REJECT_TCP_RST: | |
35 | nf_send_reset6(net, pkt->skb, pkt->ops->hooknum); | |
36 | break; | |
c1f86676 DM |
37 | default: |
38 | break; | |
cc4723ca PM |
39 | } |
40 | ||
a55e22e9 | 41 | regs->verdict.code = NF_DROP; |
cc4723ca PM |
42 | } |
43 | ||
44 | static struct nft_expr_type nft_reject_ipv6_type; | |
45 | static const struct nft_expr_ops nft_reject_ipv6_ops = { | |
46 | .type = &nft_reject_ipv6_type, | |
47 | .size = NFT_EXPR_SIZE(sizeof(struct nft_reject)), | |
48 | .eval = nft_reject_ipv6_eval, | |
49 | .init = nft_reject_init, | |
50 | .dump = nft_reject_dump, | |
51 | }; | |
52 | ||
53 | static struct nft_expr_type nft_reject_ipv6_type __read_mostly = { | |
54 | .family = NFPROTO_IPV6, | |
55 | .name = "reject", | |
56 | .ops = &nft_reject_ipv6_ops, | |
57 | .policy = nft_reject_policy, | |
58 | .maxattr = NFTA_REJECT_MAX, | |
59 | .owner = THIS_MODULE, | |
60 | }; | |
61 | ||
62 | static int __init nft_reject_ipv6_module_init(void) | |
63 | { | |
64 | return nft_register_expr(&nft_reject_ipv6_type); | |
65 | } | |
66 | ||
67 | static void __exit nft_reject_ipv6_module_exit(void) | |
68 | { | |
69 | nft_unregister_expr(&nft_reject_ipv6_type); | |
70 | } | |
71 | ||
72 | module_init(nft_reject_ipv6_module_init); | |
73 | module_exit(nft_reject_ipv6_module_exit); | |
74 | ||
75 | MODULE_LICENSE("GPL"); | |
76 | MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>"); | |
77 | MODULE_ALIAS_NFT_AF_EXPR(AF_INET6, "reject"); |